Process of molding artificial-stone building-blocks.



. A. 0-. THOMAS". PROCESS QF MOLDING ARTIFICIAL BTQNE BUILDING BLOCK APPLIOATIOK rum) 001 .12, 1901.

Pate nted Ha UNITED STATES PATENT oFFIoiE. i

'AUoUsr s o. 'rnoiaas, or kmnnnihnnnsske;

PROCESS OF MOLDING ARTIFICIAL-STONE BUILDiNG BLOCKS.

To all whom Pit-may co'ncem: 4 a i Be it known thatI, AUGUSTUS O. THOMAS, a. citizen of the United States, residing at Kearney, in the county of Buffalo and State of Nebraska, have invented oertain new and useful Improvements in Processes of Molding A-\rtificialStone Building-Blo cks, of.

which the following is aspecification.

My invention relates too. new and improved process of molding artificial stone building blocks and the like, and particularly contemplates the provision of a process whereby the block may be molded and handled at once, and whereby its usefulness and strength will be equal to that of a wet mold block which could not be handled before twenty-five or thirty-six hours.

My invention further and specifically residesin the following process of molding artificial stone building blocks as will be hereinafter particularly described with reference to the accompan ing drawings forming a part of this speci cation, in which Figure l is a plan view part1 in section of a building block constructe according to my process, and F 31;. 2 is similar view of amodified form of building 'blockconstrnetcd in accordance with my process.

According to my invention I aim to pro- --t he opportunity of handlin the product immediately. The face B 0 this block. coniprises a mixture of finely divided aggrega tes' formed in a state of high plasticity, that lS 'with moisture sullicient to render the same Specification of Letters Patent; Application filed October 12, 1907. Serial No. 397,221.

Patented MayJ'Y. 1910.

t closes the pores in the cement to further the opportunity of working the material roperly and the surface is preferably sifte over w1th finely crushed marbleor stone C prop a. beautif ing crystallized elfect.-

outside layer on the face of high lasticity tion, the surface tendency to run, dueto the oozing of the Water to the surface, and thereby enables the block toibe handled and used eonsiderabl wise possib e. to prevent the escape of moisture from the face ofhigh plasticity either by drip or vevav oration. I

i en a mixture-is made 'very dry as here tofore in molding blocks, it is hard to et suflicient water to reduce -zation, wliile the acing o 111%l1 provided by my process uses :11 e water that is necessary for perfect crystallization.

I claim:

An improvement in making 'building blocks, which consists in forming the body portion thereof, of a mixture of coarse age facing for the outer side of said body portion of a mixture of finely divided aggre ates in high plasticity for furnishin su eient. moisture for the or stallization 0 said body portion, and in orming on the surface of'said facing a thin layer in low plasticity by sifting on such surface powdered stone and cement ,to stiffen the surface of the facing and prevent the escape of moisture therefrom," substantially as escribed.

In testimony whereof I afiix my signature in presence of two witnesses.

AUGUSTUS o. THOMAS.

Witnesses: I

S. L. GARRETT, VIRGINIA MERCER.

The a dition of the powderedmarble or. other stone mixed with cement serves the vimmediate purpose of for-min a'vei'y thin perfect crysta li-' plasticity 'Havi'ng thus fully described my invention,

erly mixed with Portland cementrto produce preventing, by a thickening or sti ening jacearlier than would be other- The powder; further serves 55 gregates made in lo'w'plasticity, in forming 

